Errata: From a pattern user: On the graph, Row 1 should be:
Edge st, p1, k1, p1, k1, yf, ssk, k2, p1, k1, p1, k6 (rep * to* required no of times), p1, k1, p1, k1, K2tog, yf, k1, p1, k1, p1, edge st.
Row 2:
Edge st, k1b, p1, k1b, p5, k1b, p1, k1b, p6” (repto* required no), k1b, p1, k1b, p5, k1b, p1, k1b, edge st.
Row 3:
Edge st, p1, k1, p1, k2, yf, ssk, k1, (rep to as Row 1) to last 12sts, p1, k1, p1, k1, k2tog, yf, k2, p1, k1, p1, edge st.
Row 4 as 2 above
Row 5:
Edge st, p1, k1, p1, k3, yf, ssk, (rep to as Row 1) to last 12sts, p1, k1, p1, k2tog, yf, k3, p1, k1, p1, edge st.

The last 6 rows are the right and left edge patterns. The middle is straight 12 row cable with dropped rib over 3 sts.